a newsletter from Bayer CropScience
Volume 19 • Issue 1
One solution for 24 grassy and broadleaf weeds Now you can manage herbicide resistance and control grass and broadleaf weeds with just one solution. Herbicide resistance occurs when a weed is able to withstand a herbicide application that under normal circumstances would be lethal. One of the most effective ways to manage herbicide resistant weeds is to rotate herbicides with different modes of action. For farmers who want to control grassy and broadleaf weeds in spring and durum wheat, the product to use is Velocity m3. The two new, innovative active ingredients – Pyrasulfotole (Group 27) and Thiencarbazone-methyl (Group 2) – combined with Bromoxynil (Group 6) in Velocity m3 is proving to be a powerful management tool to control some of the worst resistant weed problems in western Canada. How it works. Pyrasulfotole (Group 27) is the first new mode of action to be developed in North America for broadleaf weed control in cereals in more than 20 years. It is absorbed through foliage and is translocated throughout the plant, resulting in systemic effects which quickly stops the plant’s growth and initiates the weed’s demise. This provides spring and durum wheat the opportunity to fully utilize available water and nutrients to achieve full yield potential. The ALS/AHAS inhibitor chemistry of Thiencarbazone-Methyl (Group 2) blocks the normal function of an enzyme called Acetolactate Synthase (ALS) or Actohydroxy Acid Synthase (AHAS) which is essential to amino acid (protein) synthesis. Without proteins, metabolic activity within the plant ceases and the plant starves to death. continued on next page